create or replace procedure Decrypt_test 
  is
  l_blob_20 blob;
  l_blob_103 blob; 
begin
  select t.blob_file
    into l_blob_20
  from store_blob_tk t
  where t.filename = 'plpdf-toolkit-install-v100_sec.pdf';
  
  dbms_lob.createtemporary(l_blob_103,TRUE);

  l_blob_103 := plpdf_toolkit.decrypt(
    p_inputfile => l_blob_20,
    p_password => 'pass12345'
    );
    
  delete from store_blob_tk where id = 103;
  insert into store_blob_tk 
    (id,blob_file,filename,desctext) 
    values 
    (103,l_blob_103,'Decrypt.pdf','id:20 plpdf-toolkit-install-v100_sec.pdf Decrypt');
  commit;    
end;  
/